I've just noted down some functions reported to missing during kernel compilation from the size overflow hash table. Without any particular symptoms.1. CC mm/slab.oFunction do_tune_cpucache is missing from the size_overflow hash table +do_tune_cpucache+2+14828+Function do_tune_cpucache is missing from the size_overflow hash table +do_tune_cpucache+0+14828+Function drain_cache_node_node is missing from the size_overflow hash table +drain_cache_node_node+0+50248+Function init_cache_node_node is missing from the size_overflow hash table +init_cache_node_node+0+29092+

in general missing hash table entries should be reported after we've regenerated the hash table for the given kernel version (which you can notice by their drastic reduction after the initial patch for that kernel version). for 4.1 this regeneration is being delayed a bit because of new developments that Emese will elaborate on soon .